reactos/dll/win32/libtirpc/src/xdr_sizeof.c

   1 /*
   2  * Copyright (c) 2009, Sun Microsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  * - Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  * - Redistributions in binary form must reproduce the above copyright notice,
  10  *   this list of conditions and the following disclaimer in the documentation
  11  *   and/or other materials provided with the distribution.
  12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  13  *   contributors may be used to endorse or promote products derived
  14  *   from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28 /*
  29  * xdr_sizeof.c
  30  *
  31  * Copyright 1990 Sun Microsystems, Inc.
  32  *
  33  * General purpose routine to see how much space something will use
  34  * when serialized using XDR.
  35  */
  36
  37 //#include <sys/cdefs.h>
  38
  39 #include <wintirpc.h>
  40 #include "namespace.h"
  41 #include <rpc/types.h>
  42 #include <rpc/xdr.h>
  43 #include <sys/types.h>
  44 #include <stdlib.h>
  45 #include "un-namespace.h"
  46
  47 /* ARGSUSED */
  48 static bool_t
  49 x_putlong(XDR *xdrs, const long *longp)
  50 {
  51         xdrs->x_handy += BYTES_PER_XDR_UNIT;
  52         return (TRUE);
  53 }
  54
  55 /* ARGSUSED */
  56 static bool_t
  57 x_putbytes(XDR *xdrs, const char *bp, u_int len)
  58 {
  59         xdrs->x_handy += len;
  60         return (TRUE);
  61 }
  62
  63 static u_int
  64 x_getpostn(XDR *xdrs)
  65 {
  66         return (xdrs->x_handy);
  67 }
  68
  69 /* ARGSUSED */
  70 static bool_t
  71 x_setpostn(XDR *xdrs, u_int pos)
  72 {
  73         /* This is not allowed */
  74         return (FALSE);
  75 }
  76
  77 static int32_t *
  78 x_inline(XDR *xdrs, u_int len)
  79 {
  80         if (len == 0) {
  81                 return (NULL);
  82         }
  83         if (xdrs->x_op != XDR_ENCODE) {
  84                 return (NULL);
  85         }
  86         if (len < PtrToUlong(xdrs->x_base)) {
  87                 /* x_private was already allocated */
  88                 xdrs->x_handy += len;
  89                 return ((int32_t *) xdrs->x_private);
  90         } else {
  91                 /* Free the earlier space and allocate new area */
  92                 if (xdrs->x_private)
  93                         free(xdrs->x_private);
  94                 if ((xdrs->x_private = (caddr_t) malloc(len)) == NULL) {
  95                         xdrs->x_base = 0;
  96                         return (NULL);
  97                 }
  98                 xdrs->x_base = UIntToPtr(len);
  99                 //xdrs->x_base = len;   // XXX Is this right???
 100                 xdrs->x_handy += len;
 101                 return ((int32_t *) xdrs->x_private);
 102         }
 103 }
 104
 105 static int
 106 harmless()
 107 {
 108         /* Always return FALSE/NULL, as the case may be */
 109         return (0);
 110 }
 111
 112 static void
 113 x_destroy(XDR *xdrs)
 114 {
 115         xdrs->x_handy = 0;
 116         xdrs->x_base = 0;
 117         if (xdrs->x_private) {
 118                 free(xdrs->x_private);
 119                 xdrs->x_private = NULL;
 120         }
 121         return;
 122 }
 123
 124 unsigned long
 125 xdr_sizeof(func, data)
 126         xdrproc_t func;
 127         void *data;
 128 {
 129         XDR x;
 130         struct xdr_ops ops;
 131         bool_t stat;
 132         /* to stop ANSI-C compiler from complaining */
 133         typedef  bool_t (* dummyfunc1)(XDR *, long *);
 134         typedef  bool_t (* dummyfunc2)(XDR *, caddr_t, u_int);
 135
 136         ops.x_putlong = x_putlong;
 137         ops.x_putbytes = x_putbytes;
 138         ops.x_inline = x_inline;
 139         ops.x_getpostn = x_getpostn;
 140         ops.x_setpostn = x_setpostn;
 141         ops.x_destroy = x_destroy;
 142
 143         /* the other harmless ones */
 144         ops.x_getlong =  (dummyfunc1) harmless;
 145         ops.x_getbytes = (dummyfunc2) harmless;
 146
 147         x.x_op = XDR_ENCODE;
 148         x.x_ops = &ops;
 149         x.x_handy = 0;
 150         x.x_private = (caddr_t) NULL;
 151         x.x_base = (caddr_t) 0;
 152
 153         stat = func(&x, data);
 154         if (x.x_private)
 155                 free(x.x_private);
 156         return (stat == TRUE ? (unsigned) x.x_handy: 0);
 157 }